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I've heard that a lot of users have had problems using this with OS X. I'm leaning more towards an Airport Extreme Base station + USB drive. Only about $30 more and compatibility guaranteed.
 
Belkin Network USB Hub Part # F5L009 Bought One for $80.00

USB hard drive of you choise. I bought 1TB for $100.00

Works Great

I got my AEBS on eBay for 90$ shipped and it looks BRAND new but used. It came to me made from Nov 2008 so I was a happy camper.

Waiting for my Mac to show up in Feb before I buy a 1TB USB drive for it.
 
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